US3716844A
Expired / Lapsed
US
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Image recording on tetrahedrally coordinated amorphous films
Assignee: International Business Machines Corp
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Filing: 1970-07-29
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Granted: 1973-02-13
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Expires: 1990-07-29
Abstract
Abstract An image can be recorded on a layer of an amorphous material such as Si, Ge, or SiC, by using a beam of electrons or light to locally heat the amorphous material in a predetermined pattern. The image can be optically observed directly after recording or can be reproduced from the transparency. The invention can be used in beam addressable memory devices, in display units, as a hard copy output without the need for development and the like.
Inventors
- 👤 M Brodsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:09
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/048; B; B41; B41M; B41M5/00; B41M5/26; B41M5/262; G03; G03C; G03C1/00; G03C1/705; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24312; G11B2007/24318; G11B2007/24328; Y; Y10; Y10S; Y10S148/00; Y10S148/12; Y10S148/148; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
72 words
A method of recording images on amorphous films including the steps of: a. preparing an amorphous film from a tetrahedrally coordinated material on a substrate, said film having its room temperature absorptance decrease with annealing at higher temperatures in its amorphous state, said film also having an amorphous to crystalline phase transformation, and b. locally heating said amorphous film by a radiation beam in a predetermined pattern to provide an image thereon.
Claim 2
Independent Claim
72 words
A method of recording images on amorphous films including the steps of: a. preparing an amorphous film from a tetrahedrally coordinated material on a substrate, said film having its room temperature absorptance decrease with annealing at higher temperatures in its amorphous state, said film also having an amorphous to crystalline phase transformation, and b. locally heating said amorphous film by a radiation beam in a predetermined pattern to provide an image thereon.
Claim 3
Dependent Claim
23 words
A method according to claim 1 wherein said tetrahedrally coordinated material is selected from the group consisting of amorphous Si, Ge and SiC.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein said tetrahedrally coordinated material is amorphous Si.
Claim 5
Dependent Claim
14 words
A method according to claim 1 wherein said tetrahedraLly coordinated material is amorphous Ge.
Claim 6
Dependent Claim
14 words
A method according to claim 1 wherein said tetrahedrally coordinated material is amorphous SiC.
Claim 7
Dependent Claim
35 words
A method according to claim 1 wherein there is added the step of controlling the localized heating of said film while retaining it in its amorphous state to thereby effect gray tones in said image.
Claim 8
Dependent Claim
40 words
A method according to claim 1 wherein there is added the step of controlling the localized heating of said film while retaining it in a mixture of its amorphous and crystalline states to thereby effect gray tones in said image.
Claim 9
Independent Claim
86 words
A device for recording and reading information comprising: a. a substrate having a disposed thereon an amorphous film prepared from a tetrahedrally coordinated material on a substrate, said film having its room temperature absorptance decrease with annealing at higher temperatures in its amorphous state, said film also having an amorphous to crystalline phase transformation, and b. beam means for locally heating said amorphous film in a predetermined pattern thereby changing its optical properties and thereby providing an image; and c. optical means for viewing said image.
Claim 10
Independent Claim
86 words
A device for recording and reading information comprising: a. a substrate having a disposed thereon an amorphous film prepared from a tetrahedrally coordinated material on a substrate, said film having its room temperature absorptance decrease with annealing at higher temperatures in its amorphous state, said film also having an amorphous to crystalline phase transformation, and b. beam means for locally heating said amorphous film in a predetermined pattern thereby changing its optical properties and thereby providing an image; and c. optical means for viewing said image.
Claim 11
Dependent Claim
22 words
A device according to claim 8 wherein said tetrahedrally coordinated material is selected from the group consisting of Si, Ge and SiC.
Claim 12
Dependent Claim
16 words
A device according to claim 8 wherein said amorphous film is a film of amorphous Si.
Claim 13
Dependent Claim
16 words
A device according to claim 8 wherein said amorphous film is a film of amorphous Ge.
Claim 14
Dependent Claim
16 words
A device according to claim 8 wherein said amorphous film is a film of amorphous SiC.
Claim 15
Dependent Claim
23 words
The device of claim 8, wherein there are three layers of said amorphous film, each said layer absorbing energy of a different wavelength.
Claim 16
Dependent Claim
57 words
An article for recording hard copy images comprising: a. a substrate b. at least one layer of an amorphous film said amorphous film being prepared from a tetrahedrally coordinated material and having its room temperature absorptance decrease with annealing at a higher temperature in its amorphous state, said film also having an amorphous to crystalline phase transformation.
Claim 17
Dependent Claim
57 words
An article for recording hard copy images comprising: a. a substrate b. at least one layer of an amorphous film said amorphous film being prepared from a tetrahedrally coordinated material and having its room temperature absorptance decrease with annealing at a higher temperature in its amorphous state, said film also having an amorphous to crystalline phase transformation.
Claim 18
Dependent Claim
22 words
An article according to claim 14 wherein said tetrahedrally coordinated material is selected from the group consisting of Si, SiC and Ge.
Claim 19
Dependent Claim
18 words
An article according to claim 14 where at least one layer of said amorphous film is amorphous Si.
Claim 20
Dependent Claim
18 words
An article according to claim 14 wherein at least one layer of said amorphous film is amorphous SiC.
Claim 21
Dependent Claim
18 words
An article according to claim 14 wherein at least one layer of said amorphous film is amorphous Ge.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |